Precipitation Type Classification Method and Classification System Based on Typhoon Climate Precipitation Rate

A technology of precipitation types and classification methods, applied in data processing applications, instruments, calculations, etc., can solve problems such as inapplicability, and achieve the effect of lowering the threshold of precipitation rate

Active Publication Date: 2022-03-04
SHANGHAI TYPHOON INST CMA
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Problems solved by technology

[0006] In order to overcome the inapplicability of existing classification methods in typhoon precipitation type classification, the present invention proposes a precipitation type classification method based on typhoon climate precipitation rate. Necessary modifications and improvements in order to be applicable to the classification of convective and stratus types of typhoon precipitation

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  • Precipitation Type Classification Method and Classification System Based on Typhoon Climate Precipitation Rate
  • Precipitation Type Classification Method and Classification System Based on Typhoon Climate Precipitation Rate
  • Precipitation Type Classification Method and Classification System Based on Typhoon Climate Precipitation Rate

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Embodiment

[0068] Take the data of typhoon "Fitte" on October 6-8, 2013 as an example. Typhoon "Fite" landed in northern Fujian, but it brought heavy rain along the coast of Hangzhou Bay, causing serious floods. Among them, the accumulated precipitation in the Songjiang area in the western suburbs of Shanghai exceeded 100 millimeters, causing serious urban waterlogging and causing underground garages in many residential areas to be flooded. This precipitation was just collected by the OTT PARSIVEL raindrop spectrometer in Shanghai Pudong World Expo Station during the whole process, so the raindrop spectrum data of typhoon "Fite" will be used to test the precipitation type classification method based on the typhoon climate precipitation rate of the present invention.

[0069] figure 1 a represents the precipitation at 1-minute intervals calculated from the raindrop spectrum. figure 1 Convective, stratiform and mixed cloud precipitation samples are represented by gray, dark and light poi...

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Abstract

The present invention proposes a method for classifying precipitation types based on the typhoon climate precipitation rate, including: for detecting the precipitation type at a moment, obtaining multiple continuous samples R of the precipitation rate in the time interval before and after the moment i‑n ~R i+n ;According to the type of typhoon rain belt precipitation, the climate of the precipitation area and the historical records of precipitation, set the lower threshold, difference threshold and upper threshold of precipitation; according to the lower threshold, difference threshold and upper threshold, it is judged that this moment is stratus precipitation , convective precipitation or mixed cloud precipitation. The invention fully considers that the difference in the formation mechanism between typhoon rain belt precipitation and precipitation in other weather systems leads to different raindrop spectrum characteristics of precipitation, which is reflected in the ground raindrop spectrum instrument observation.

Description

technical field [0001] The invention relates to precipitation measurement and analysis technology, in particular to a precipitation type classification method and a classification system based on typhoon climate precipitation rate. Background technique [0002] Rainfall in typhoon rain belts also includes two types of precipitation: stratiform precipitation and convective precipitation. Among them, stratiform precipitation is produced in the upper atmosphere, from the altostratus formed by the tiny solid particles (small ice crystals) formed by the strong upward movement of the typhoon eyewall area in the upper atmosphere and spreading outward, so this type of stratiform precipitation The precipitation rate is relatively low; while the convective precipitation is mainly caused by the typhoon convective rain belt passing over the raindrop spectrum collection instrument. This kind of convective precipitation has a short residence time when the rain belt passes through the rain...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0639G06Q50/26
Inventor 鲍旭炜吴立广林立旻
Owner SHANGHAI TYPHOON INST CMA
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